<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>层叠样式表</title>
<style>
	body{
		font-family:"仿宋","微软雅黑";
	}
	
	h1{
		font-size:30px;
	}
	
	
	h1{
		color:black;
		font-size:50px
	}
	
	
	
	
	
</style>

<link rel="stylesheet" href="hw.css"/>

</head>
<body>
	<h1 style="color:red;">CSS的三种用法</h1>
	<p>1.内联样式</p>
	<p>2.内部样式</p>
	<p>3.外部样式</p>

	
	
	
</body>
</html>